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- Title
4 种矿物质载体对硝化微生物富集培养的影响.
- Authors
杨帆; 邓学智; 刘佳; 徐爱玲; 宋志文
- Abstract
Nitrifying microorganisms, being essential in denitrification process of wastewater treatment, are characterized with attachment growth. For the purpose of boosting enrichment culture of nitrifying microorganisms, adequate carriers are used, onto which the microorganisms grow. This paper described the experiment for selecting desirable carrier, thus four kinds of minerals, i.e. sodium bentonite, calcium bentonite, calcium carbonate and diatomaceous earthwere, were undergone testing for the enrichment culture of nitrifying microorganisms. So the effects of different minerals on the oxi⁃ dation rates of ammonia and nitrite of nitrifying microorganisms were investigated based on the probing into their struc⁃ tural characteristics. The experimental results showed that, compared with the control groups, after carriers were applied the ammonia oxidation rate increased by 81.9% to 192.8% while nitrite oxidation rate increased by 93.2% to 155.6%; and among others, the carrier of diatomaceous earth displayed the best performance, i.e., ammonia oxidation rate and nitrite oxidation rate increased by 192.8% and 155.6%, respectively. Raising the proportion of diatomaceous earth dosed could increase the ammonia oxidation rate and nitrite oxidation rate of 121.1% to 262% and 101.2% to 216%, respectively, in spite of that the specific ammonia oxidation rate and specific nitrite oxidation rate decreased from 32% to 59.1% and from 36.7% to 60.8%, respectively; however, when proportion of diatomaceous earth dosed being equal to 4%, the best result was obtained. In addition, it proved that growth of nitrifying microorganisms in the enrichment culture process was consistent with the Logistic growth model, and as the diatomite dosing ratio was increased the carrier utilization ra⁃ tio declined.
- Publication
Environmental Science & Technology (10036504), 2020, Vol 43, Issue 10, p27
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.2020.10.004